Cover title from opening screen (viewed on November 20, 2012).; "January 31, 2008."; This study was funded by the Maternal and Child Health Bureau, Health Resources and Services Administration, US Department of Health and Human Services through...

"This publication is a product of the CTE/NCDOT Joint Environmental Research Program"--Cover.; "June 2005."; Includes bibliographical references (p. 293-294).; Final report;; Supported by a grant from the US Department of Transportation and the...